Warp stop-motion for looms.



L. S. BURBANK:

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED DEC.26. I914.

I Patented Sept. 18, 1917.

2 SHEETS-SHEET 1.

f |l 31 1 ll v Inventor; iThesse s. Louis S; Burb qnK, 2 Z164 Yz w Maia,

'L. s. BURBANK. WARP STQP MOTION FOR LOOMS. APPLICATION FILED DEC-26. 19H.

1,240,666. PatentedSept. 18,1917. I

F; 3 ZSHEETS-SHEET 2.

, lnven'for. Louis S. BurbunK.

UNITED STATES PATENT orrron;

LOUIS s. BURBANK, or HOPEDALE, MASSACHUSETTS; essrelvoi BY MESNE ASSIGN- MEN'IS, T0 DRAPER CORPORATION, OF HOPEDALE, MASSACHUSETTS, A cORPORA- TION 0F MAINE.

- WARP s'ror-iuorron ron Looms.

' Application-filed December 26, 1914. Serial No. 879,005

To all whom it may concern:

Be it known that I, LOUIS S. BURBANK, a citizen of the United States, residing at Hopedale, county oflVorcester, State of Massachusetts, have invented an Improvement in Warp Stopllotions for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts. a

This invention relates to warp stop motions for looms of the general type and in its preferred form to that typeof warp stop motion wherein controlling detectors are suspended from the warps and normally held thereby out of the path of a vibrating feeler, release of a detector by failure of the warp restraining vibration of the feeler and wherein upon such restraining movement is transmitted to a pivoted dog mounted on the loom frame to move the dog into the path of a hunter carried by the lay and thereby to effect a change in the operation of the loom, such as the stopping of the loom through the usual knock-off lever,

The invention in one of its broad features involves a novel means of transmitting movement from the warp failure detecting means to the loom change efiecting means and the invention in its broader aspects is therefore not limited to the particular kind of warp failure detecting means, nor the particular kind of loom change effecting means between which the movement is transmitted.

Another object of the invention is to pro vide a connecting means for the transmis sion of movement from the warp failure detecting means to the loom change effecting means of such a character that either of the means so connected may be adjusted or repositioned without requiring an adjustment or re-positioning of the connecting means.

Another feature of the invention resides in the provision of a flexible connector eX- tending between the said means and acting by the transmission of thrust therethrough tocause the actuation of the loom change efenables. the feeler to be jiggled to ascertain the location of thedropped detector and secures many other advantages. 7 i

The objects and nature of the invention will more fully appear from the; accompany mg description and drawings and will be defined in the appended claims.

The drawings show so much of onetype of automatic filling replenishing loom as is necessary to a disclosure of the present invent on. I y

In the drawings, 1 I

F'gure 1 is a left hand side elevation of a sufficient portion of the loom with a preferred embodiment of the present invention applied thereto, 'theshafts being'shown in section;

Fig. 2 is a detail in vertical section show ing the construction and mounting of the dog and adjacent parts;

Fig. 3 is a front elevation of a portion of the loom showing the preferred form of parts embodying the invention'in place;

Fig. at is a detail partially in horizontal cross section of the parts connected to the feeler rock shaft and taken on the line ma2, Fig. 5; V

Fig. 5 is an end View partially in cross section of the construction shown in Fig. 4.

This invention is illustrated in its preferred form in connection-withv a type of loom provided with warp failure detecting means and loom change effecting means such in general, as shown, for example, in the to Ambler No. 885,130 granted April 21, 1908. The loom change effecting means is herein shown as a loom stopping means and specifically as a means for knocking oif the shipper by which the loom isstopped. The particular construction of the 100m and the various mechanisms with which the pres ent invention is designed to cooperate is not involved in the present invention and may take various forms.

Referring to the particular construction illustrated the lay 1 has secured thereto and depending therefrom the usual hunter 2, the efiective portion of which points to the rear oftheloom. The usual shipper 3 by which the beltis shifted from the fast to the loose pulley to stop the loom is moved to stopping position by a knock-oil" lever 4e pivoted at 5 to the loom side 6. In the construction illustrated this knock-off lever 41 is by its shape Weighted so as normally to the feeler rock shaft 20.

swing to running position as shown in Fig. 1 without requiring a spring to throw it to such position;

A link-is pivotally connected at 7 to an upwardly extending arm of the knock-oft lever and at its other end by a pivot 8 to a dog 9. This link is made in two parts 10 and 11 adjustably connected together by the set screws 12. If now the dog 9 be swung upwardly on its pivot into the path of the hunter 2 this 'bunter on the rearward movement of the lay will catch on the dog and through the medium of the link throw the knock-off lever to .move the shipper and stop the loom.

In the construction? of this invention the pivot 8 connecting the link and the dog is carried at the upper end of a link connec tion 13, the lower end of which is pivoted at 14 to some portion of the loom frame such as the bracket 15 herein shown as secured to the loom side. This connection as will be explained later causes the dog as it is moved rearwardly also to be slightly bodily moved upwardly.

The warp failure detecting means herein illustrated in connection with the present invention is in its main-features of a well known and familiar type. It comprises a number of detectors 16 preferably arranged in two series transversely of the loom slotted to pass over the detector supporting bar 17 and each detector suspended from a warp thread. A vibrating feeler shownas a horizontal plate 18 supported on the arms 19 extending from the feeler rock shaft 20 is constantly vibrated beneath the detector supporting bars. Upon the failure of a warp as by breaking the corresponding de tector drops bringing its end below the plane of the feeler plate 18 and consequently vibration of the feeler is restrained. This restraint of movement of the vibrating feeler is made use of in this type of mechanism to eflect the movement of the dog 9 into the path of the bunter 2.

In the construction herein illustrated in connection with the present invention the feeler arms 19 are rigidly secured at 21 to An abutment 22 is also rigidly secured as by the set screw 23 to the rock shaft 20; a collar 2% is rigidly secured by the set screw 25 to the rock shaft between the abutment and one of the feeler supporting arms 19. A sleeve 26 is loosely mounted on the rock shaft 20 between the abutment 22 and the collar 24 so as to be capable of rotary and sliding movement on the rock shaft. This sleeve and the adjacent abutment are formed with cooperating cam surfaces as shown for example in Fig. 41:. A helical spring 27 extends between the collar 24 and sleeve 26 and acts to maintain the cam surfaces of the sleeve and abutment in contact.

The sleeve 26 is provided with a forwardly projecting arm 28 and this arm is vibrated by. a connection to the camshaft 29. This vibrating connection is itself of novel form. It comprises a link 29* pivoted to the arm 28 offset at 30 to clear the mainshaft 31 and the parts carried by it, and is adjustably connected at 32 at its lower end to a yoke 33 straddling the cam shaft 29. This yoke has pivoted at either side a crescent shaped cam follower 3%. The operating cam 35 is a face cam secured to the cam shaft 29 at either side of the yoke 33 as particular conditions require, and this reversible construction of the cam and follower is verydesirable. The cam 35 is provided on its face with the double concentric switching groove 36 of the general form illustrated inFig. 1. This preferred construction gives a comparatively slow vibration to the rock shaft 20 and consequently to the feeler. I

The present invention is more particularly concerned with the means for transmitting the indication of warp failure to effect the operation of the loom change eflecting means such as the knock-off motion, and in the particular form illustrated to a mechanism of this type comprising the pivoted dog which is moved into the path of a hunter on the lay.

It is very desirable in loom mechanisms of this type to be able to adjust and re-position the elements of the warp protecting means and the elements of the loompstopping means or loom change effecting means such as the dog, hunter and connected parts and make these adjustments and re-positionings independently of the other.. This re- :ult is readily efiected' by the present invenion.

The main feature of this invention is the provision of a flexible connector by means of which a thrusting movement is transmitted from the warp failure detecting means to the loom change effecting means. This is secured by a flexible connector having a plurality of parts. preferably two, which are substantially conterniinous and juxtaposed and which are longitudinally and relatively movable and by making use of this relative movement.

In the preferred form illustrated this flexible connector comprises a flexible sheath herein shown as a long wire helix of small diameter and a flexible core of wire fitting inside the sheath. The relative movement of these two parts of the flexible connector is provided for by securing the sheath at its ends against longitudinal movement while permitting longitudinal movement of the internal core. I v

The flexible sheath 37 is herein shown as secured against longitudinal movement at one end adjacent the loom change effecting its means in the bracket 15 and at its other end in a socket inthe arm 38 rigid with the rear arm 19. In each instance a split steel sleeve or bushing 39 surrounds the sheath in the socket and is held in place and caused to clamp the sheath by a set screw 40. Between these points it may be carried wherever clesired and is shown as passing through the loom side. distance between its rigidly supported ends may be varied as required to allow of any independent re-adjustment of the mechanisms'of the loom.

The flexible core or wire 41 adjacent the dog 9 preferably contacts with a pin or plunger 42 sliding in a socket in the bracket 15 and this pin is so positioned as just to contact with the dog 9 when-the dog is in its normal or ineffective position.

Thrust may be transmitted to the core 41 at the opposite end upon the restraint of the vibrating feeler in any suitable manner. As a preferred construction there is herein shown a rod 43 having one end entering the sleeve or bushing 39 in the arm 38 and abutting the end of the core 11 and having its other end seated in a socket in the sleeve 26. Owing to the fact that the sleeve 26 and arm 28 have a relative rotary movement the rod 4L3 at each end has a universal connection which may be of the types illustrated in Fig. 4:. r

. lVhen thrust is imparted to the core ll that thrust will be transmitted to the pin 42 causing the elevation of the dog 9. The core 41 is returned in the opposite direction by the weight of the parts including the dog 9 and also by the action of a helical spring 1 1 seated in a socket in the rearward end of the link part 11 and abutting against the dog 9.

It will also be noted by reason of the link construction 13 already described that when a thrust has been imparted to the core 41 causing the pin 42 to raise the dog to active position into the path of the hunter 2 and the hunter comes in contact with the dog carrying it rearwardly that the dog will by reason of the link connection be bodily raised slightly thus clearing the pin 12 and the stop on the bracket against which the dog normally rests, and leaving a slight space between the pin and the dog. This leaves lost motion so that the operative taking hold of the usual handle 45 connected with an arm 46 on the feeler rock shaft can jiggle the feeler and ascertain the position of the detector which has dropped.

The operation of the loom and the parts involved in this invention in the preferred form illustrated will now be apparent. With the loom running the knock offlever 4 is in the position shown'in Fig. 1, the dog 9 is in its lower or inactive position and the cam 35 is slowly vibrating the feeler It hangs loosely and thus the holds it and the connected rock shaft 20 against vibration. But as the action of the cam 35 continues the sleeve 26 loosely mounted on the shaft also continues vibration, and consequently is forced longitudi nally on the shaft against the tension of the sprin 27 by the action of the cooperating cam surfaces on the sleeve and abutment 22. This causes the rod as to move longitudinally and transmit its movement to the core ll of the flexible connector. dinal movement is transmitted through the core and its pin 42 to the dog 9 elevating the dog against the action of the spring 4:4: into the path of the hunter 2. As the lay beats hack the hunter 2 strikes the dog 9 carrying back with it the dog, the linkll, 10 and swinging the knock-off lever against the shipper to stop the loom.

Having fully described my invention, what Iclaim as new and desire to secure by Letters Patent is: V

1. A loom comprising loom change effect: ing means; a lay provided with a hunter;

' a dog connected with the loom change effecting means, mounted on the loom frame, movable into the path of the hunter, and acting when struck by the hunter to actuate the said loom change effecting means; warp failure detecting means; a flexible sheath having its ends secured against longitudinal movement, one adjacent said dog and the other adjacent said detecting means; a flexi- This longitu- 1 ble-core located in, and longitudinally move able with respect to, and laterally supported by, said sheath; and means operated by said detecting means upon detection of a warp failure to transmit a longitudinal thrust to said core and therefrom to said dog to move the dog into the path of the hunter and thus effect the actuation of the loom change effecting means.

2. A loom comprising warp failure detect-- ing means; loom change eflecting means; a flexible connector .extending between said means and comprising two relatively and longitudinally movable substantially conterminous juxtaposed parts which act to prevent relative transverse movement; and means for operating by or through a longitudinal thrust of one of said connector parts the loom change effecting means upon a detecting action of the warp failure detecting means. r

3. A loom comprising warpfailure detecting means; loom change effecting means; a flexible connector comprising a sheath rigidly secured at its ends adjacent said respective means and extending between said means, and a corelongitudinally movable in said sheath and prevented from relative transverse movement thereby; and means for operating by a thrusting movement of said core the loom change effecting means upon a detecting action of the warp failure the oaeration of the loom chan e effecting means.

5. A loom comprising loom change effect ing means, a vibrating feeler; a flexible connector comprising a sheath having its ends secured adjacent said feeler and said loom change effecting means, and a core in said sheath movable longitudinally thereof, and thereby prevented from transverse movement with respect thereto; a warp failure detecting means comprising a plurality of detectors each movable upon fail ure of its corresponding warp into an ab normal position and when so moved acting to restrain vibration of the feeler; and means actuated upon the restraint of the feeler to transmit a longitudinal thrust to said core and therethrough to cause the operation of the loom change effecting means.

6. A loom comprising loom change efiecting means; a rock shaft; a feeler secured to said rock shaft; a flexible connector extending from adjacent said feeler to adja cent said loom change effecting means and comprising a sheath having its'ends secured against longitudinal movement, and a core longitudinally movable in said sheath and thereby prevented from transverse move ment with respectthereto; a sleeve slidingly and rotarily mounted on said rock shaft and an abutment rigidly mounted on said rock shaft, the said sleeve and abutment being provided with cooperating cam surfaces, and a spring for normally holding the sleeve in engagement with the abutment; means for vibrating the sleeve and through it the abutment, rock shaft, and feeler; a connection between said sleeve and core whereby upon longitudinal movement of the sleeve a longitudinal thrust will be transmitted to the core; a warp failure detecting means comprising a plurality of detectors each movable upon failure of its corresponding warp into an abnormal position and when so moved acting to restrain vibration of the feeler, rock shaft and abutment whereby through the action of the cooperating cam surfaces the sleeve will be'moved against the action of the spring and a longitudinal thrust transmitted to the core to cause the operation of the loom change efiecting means.

7. A loom comprising warp failure detecting means; loom change effecting means; a

flexible sheath having its ends securedv against longitudinal movement one adjacent said warp failure detecting means and the other adjacent said loom change effecting means, a flexible core located in and longitudinally movable with respect to said longitudinally movable in said sheath; a

sleeve slidingly and rotarily mounted on said rock shaft and an abutment rigidly mounted on said rock shaft, the said sleeve and abutment being provided with cooperating cam surfaces, and a springfor normally holding the sleeve in engagement with the abutment; means for vibrating the sleeve and through it the abutment, rock shaft and feeler; a rod having a hearing at one end in said sleeve and at the other end entering said sheath and abutting said core whereby upon longitudinal movement of the sleeve longitudinal movement will be transmitted through said rod to the core; and warp failure detecting means acting upon warp failure to restrain vibration of the feeler rock shaft and abutment whereby through the action of the cooperating cam surfaces the sleeve will be moved against the action of the spring transmitting longitudinal movement throughthe rod and core to cause the operation of the loom change effecting means.

9. A loom comprising loom change effecting means; a lay provided with a hunter; a dog connected with the loom change effectin means, pivoted on the loom frame, movable into the path of the hunter, and acting when struck by the hunter to actuate the said loom change effecting means; warp failure detecting means; a flexible sheath having its ends secured against longitudinal movement; one adjacent said dog and the other adjacentsaid detecting means; a flexible core located in, and longitudinally movable with respect to, said sheath and having a pin engaging said dog; and means operated by said detecting means upon detection of a warp failure to transmit lon itudinal movement to said core and there y to cause the pin to move the dog into the path of the hunter and thus effect the actuation of the loom change effecting means.

10. A loom comprising loom change eflecting means; a'lay provided with a hunter; 2, dog connected with the loom change effecting means, pivoted on the loom frame, movable into the path of the hunter, and acting when struck by the hunter to actuate the said loom change effecting means; warp failure detecting means; a flexible sheath having its ends secured against longitudinal movement, one adjacent said dog and the other adjacent said detecting means; a flexible core located in, and longitudinally movable with respect to, said sheath and having a pin engaging said dog; and means operated by said detecting means upon detection of a warp failure to transmit longitudinal movement to said core and thereby to cause the pin to move the dog into the path of the hunter and thus effect the actuation of the loom change efiecting means; and a spring acting on said dog in opposition to the thrust of said core.

11. A loom comprising loom change effecting means; a lay provided with a hunter, a dog connected with the loom change effecting means, mounted on the. loom frame, movable into the path of the hunter, and acting when struck by the hunter to actuate the said loom change efiecting means; warp failure detecting means; a flexible connector extending between said dog and said warp failure detecting means and comprising two relatively and longitudinally movable substantially conterminous juxtaposed parts one of which acts to support the other throughout against transverse movement with re- Copies of this patent may be obtained for spect thereto; and means actuated by said detecting means upon detection of a warp failure for moving by or through a longitudinal thrust of the said transversely supported connector part the dog into the path of the hunter and thus effecting the actuation of the loom change effecting means.

12. A loom comprising loom change efiecting means; a lay provided with a hunter; a dog connected with the loom change efiecting means; a link connection between said dog and the loom frame whereby when the dog is moved into the path of the hunter it will be struck thereby to actuate the said loom change effecting means and will be bodily moved away from the point of piv otal connection of the link' and loom frame;

a vibrating feeler; a flexible connector comprising a sheath having its ends secured adjacent said feeler and said dog and a core in said sheath movable longitudinally thereof and having a pin and normally in contact with said dog; a warp failure detecting means comprising a plurality of detectors each movable upon failure of its corresponding warp into an abnormal position and when so moved acting to restrain vibration of the feeler; and means actuated upon the restraint of the feeler to move said core longitudinally and therethrough to move the dog into the path of the hunter; whereby when the dog is struck by the hunter the dog moves away from the pin of the core thus permitting jiggling of the vibrating feeler to ascertain the abnormally located detector.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

LOUIS S. BURBANK.

Witnesses:

GEORGE -A. MARTIN, DANA Oseoon.

five cents each, by addressing the Commissioner of latents, Washington, D. G. 

